One problem related to engine has been reported for the 2009 Acura TSX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Acura TSX based on all problems reported for the 2009 TSX.
Engine pings excessively under load at between 2,000 - 2,500 rpm. I am running premium fuel (91 octane) as dictated by the owner's manual. This happens every time I drive the car.